Photographic system

ABSTRACT

A system for exposing, processing and projecting strip film comprising a cassette containing a roll of film connected at its ends to supply and takeup reels and passing therebetween through a film gate for cooperation with a camera and with a film drive and projection system. The cassette contains processing means, operating in a predetermined sequence determined by means within the cassette, and energized by drive energy supplied externally to sprocket holes on the film and to the takeup and supply reels by the film drive and projection system. An electrical signal generator within the cassette supplies an external signal to select the mode of operation of the film drive and projection system in dependence upon the processed or unprocessed state of the film.

[ Aug. 20, 1974 PHOTOGRAPHIC SYSTEM [75] Inventor: john F. fiftefi jrlljn coln Mass.

[73] Assignee: Polaroid Corporation, Cambridge,

Mass.

[22] Filed: Aug. 20, 1973 21 Appl. No.: 389,997

- Related US. Application Data [63] Continuation of Ser. No. 227,150, Feb. 17, 1972,

3,627,407 12/1971 Cook 352/130 R 3,641,896 12/1972 Downey 95/89 R 3,667,361 6/1972 Meggs 95/13 Primary ExaminerMonroe l-l. Hayes Attorney, Agent, or Firm-John W. Ericson [5 7] ABSTRACT A system for exposing, processing and projecting strip film comprising a cassette containing a roll of film connected at its ends to supply and takeup reels and passing therebetween through a film gate for cooperation with a camera and with a film drive and projection system. The cassette contains processing means, operating in a predetermined sequence determined by means within the cassette, and energized by drive energy supplied externally to sprocket holes on the film and to the takeup and supply reels bythe film drive and projection system. An electrical signal generator within the cassette supplies an external signal to select the mode of operation of the film drive and projection system in dependence upon the processed or unprocessed state of the film.

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1. In combination with a film cassette comprising an opaque housing, a takeup reel and a supply reel rotatably mounted in said housing, a strip of film having opposed ends, one of said ends being connected to said supply reel and the other of said ends being connected to said takeup reel, means forming a film gate in said housing, said film passing between said reels through said film gate for cooperation with a camera, for exposure of said film, and with projection means, for projection of said film, sai film being formed over at least a substantial portion of its length with a regularly spaced series of sprocket holes, each adapted to cooperate with a first incremental film advance means on a camera to move the film from said supply reel by an increment approximating the spacing between said sprocket holes, said series being interrupted at a first location adjacent the end of said film connected to said supply reel by means forming a first elongated sprocket hole having a first length sufficient to admit a first incremental advance means without advancing the film, whereby exposure of the film in the camera is terminated at a second location nearer to the end of said film connected to said supply reel than said first location by means forming a second elongated sprocket hole having a second length greater than said first length, said series and said first elongated sprocket hole each being adapted to cooperate with a second incremental advance means on a projection means to move the film from said supply reel by an increment approximating the spacing between the sprocket holes of said series, said second length being sufficient for said second elongated sprocket hole to admit a second incremental advance means without advancing the film, whereby projection of the film in the projection means is terminated adjacent said second location.
 2. The apparatus of claim 1, further comprising film processing means mounted in said housing and responsive to engagement by an actuating element to operatively engage said film, and means forming an actuating element on said film at a location adapted to engage said processing means when said film is advanced from said supply reel beyond the termination point established by said first elongated sprocket hole.
 3. The apparatus of claim 2, in which said actuating element comprises an edge of an aperture formed in said film, and in which engagement of said actuating means with said processing means causes movement of at least a portion of said processing means over a path terminated in a film position established by said second elongated sprocket hole.
 4. The apparatus of claim 3, in which said edge is formed on a region on said film protruding from the film to form an engaging ledge.
 5. The apparatus of claim 4, further comprising at least one aperture formed in said film between said actuating element and said end of said film connected to said supply reel to receive and contain the protruding portion of said film, when said film is advanced onto said supply reel, whereby said film can be evenly rewound onto said supply reel.
 6. The apparatus of claim 2, in which said actuating element comprises a portion of said film deformed to protrude from the plane of the film and thereby engage said processing means to effect movement of at least a portion of said processing means over a path terminated in a film position established by said second elongated sprocket hole.
 7. The apparatus of claim 6, further comprising means forming at least one aperture in said film between said protruding portion of said film and said end of said film connected to said supply reel in position to receive and contain said protruding portion when said film is rewound on said supply reel, whereby said film can be smoothly rewound on the supply reel.
 8. The apparatus of claim 7, in which said protruding portion terminates at an end facing said takeup reel by means forming an aperture comprising an edge of said protruding portion adapted to engage said processing means.
 9. The apparatus of claim 2, in which said actuating element comprises at least one edge of at least one aperture formed in at least one side of said film, and in which engagement of said actuating means with said processing means causes movement of at least a portion of said processing means over a path terminated in a film position established by said second elongated sprocket hole.
 10. The apparatus of claim 9, in which said actuating element comprises notches formed on opposite sides of said film in alignment along a normal to the path of movement of said film and having edges adapted to engage said processing means.
 11. The apparatus of claim 10, in which said notches are formed with tapering edges opposite said processing means engaging edges, whereby said actuating element is effective to engage said processing means only when said film is advanced from said supply reel.
 12. In combination with a film cassette comprising a light-tight housing, a takeup reel and a supply reel rotatably mounted in said housing, a strip of film having opposed ends, one of said ends being connected to said supply reel and the other of said ends being connected to said takeup reel, means forming a film gate in said housing, said film passing between said reels through said film gate for cooperation with a camera, for exposure of said film, and with projection means, for projection of said film, said film being formed over at least a substantial portion of its length with a regularly spaced series of sprocket holes each adapted to cooperate with a first incremental film advance means on a camera to move the film from said supply reel to said takeup reel by an increment approximating the spacing between said sprocket holes, said series being interrupted at a first location adjacent the end of said film connected to said supply reel by means forming an elongated sprocket hole having a length sufficient to admit a first incremental advance means without advancing the film, whereby exposure of the film in the camera is terminated adjacent said first location, said series and said elongated hole each being adapted to cooperate with a second intermittant advance means on a projection means to move the film from said supply reel to said takeup reel by an increment approximating the spacing between the sprocket holes of said series, whereby the film may be advanced by the projection means beyond the exposure termination point established by said elongated sprocket hole, film processing means mounted in said housing and responsive to engagement by an actuating element to operatively engage said film, and means forming an actuating element on said film at a location adapted to engage said processing means when said film is advanced from said supply reel beyond said exposure termination point.
 13. The apparatus of claim 12, in which said actuating element comprises an edge of an aperture formed in said film.
 14. The apparatus of claim 13, in which said edge is formed on a region of said film protruding from the film to form an engaging ledge.
 15. The apparatus of claim 14, further comprising at leasT one aperture formed in said film between said actuating element and said end of said film connected to said supply reel to receive and contain the protruding portion of said film, when said film is advanced onto said supply reel, whereby said film can be evenly rewound onto said supply reel.
 16. The apparatus of claim 12, in which said actuating element comprises a portion of said film deformed to protrude from the plane of the film and thereby engage said processing means.
 17. The apparatus of claim 16, further comprising means forming at least one aperture in said film between said protruding portion of said film and said end of said film connected to said supply reel in position to receive and contain said protruding portion when said film is rewound on said supply reel, whereby said film can be smoothly rewound on the supply reel.
 18. The apparatus of claim 17, in which said protruding portion terminates at an end facing said takeup reel in means forming an aperture comprising an edge of said protruding portion adapted to engage said processing means.
 19. The apparatus of claim 12, in which said actuating element comprises at least one edge of at least one aperture formed in at least one side of said film.
 20. The apparatus of claim 19, in which said actuating element comprises notches formed on opposite sides of said film in alignment along a normal to the path of movement of said film and having edges adapted to engage said processing means.
 21. The apparatus of claim 20, in which said notches are formed with tapering edges opposite said processing means engaging edges, whereby said actuating element is effective to engage said processing means only when said film is advanced from said supply reel.
 22. In combination with a film holder comprising a housing enclosing a strip of film, processing means adapted to engage said film, said processing means comprising outer wall means formed integrally with said housing and forming a passage terminating at a location confronting the film in a first opening through which processing composition is adapted to pass to the film, container means mounted in said passage, said container means comprising wall means forming a receptacle having a second opening adapted to communicate with said passage, said wall means further comprising flange means having portions engaging cooperating recesses in said outer wall means to retain said container in fixed position in said passage, said flange means further comprising portions surrounding said second opening, flexible sealing means covering said second opening and detachably sealed to said portions of said flange means surrounding said second opening, an amount of film processing composition in said receptacle sufficient to process said film, and release means connected to said sealing means at one end thereof and responsive to an applied force to detach at least a portion of said sealing means from said container to release said composition into said passage and allow it to pass through said first opening.
 23. The apparatus of claim 22, in which said sealing means comprises a region of reduced strength adjacent said end connected to said release means, whereby said sealing means is torn in said region during detachment of said sealing means by said release means to facilitate the escape of processing composition from said container.
 24. The apparatus of claim 23, in which said region commences at a location adjacent said end of said sealing means and extends therefrom over said second opening in a pair of divergent branches.
 25. The apparatus of claim 22, further comprising a coating nozzle connected to said outer wall means and comprising an inlet port communicating with said first opening and an outlet port communicating with said inlet port and adapted to contact said film.
 26. The apparatus of claim 25, in which said nozzle further comprises wall means forming a coating channel adjacent said outlet port and comprising doctor means in the patH of processing composition passing through said nozzle onto said film to limit and control the thickness of the coating composition deposited on the film.
 27. The apparatus of claim 25, further comprising pressure plate means mounted in said housing for movement between a first position resiliently biasing said film into contact with said nozzle and at least one other position out of engagement with said film, and means located on said film for moving said pressure plate to its first position in a predetermined position of said film in said housing.
 28. The apparatus of claim 27, further comprising means located on said film for moving said pressure plate away from said first position in a second predetermined position of said film in said housing.
 29. The apparatus of claim 28, further comprising means responsive to the position of said film in said housing for applying a force to said release means to open said container.
 30. In combination, a lighttight housing, a supply of strip film substantially contained in said housing and extending out of and back into said housing through opposed light-baffled apertures, reversible film transport means connected to said film for moving it through said apertures in first and second opposite directions over a substantial portion of its length, said film transport means being adapted to cooperate with a camera for selective exposure of said film as it is advanced through said apertures in said first direction to a predetermined exposure end point, film processing means mounted in said housing, first control means in said housing and operable in response to said film transport means to connect said processing means to said film when said film is advanced in said first direction beyond said predetermined end point, and second control means in said housing and operable in response to said film transport means for disconnecting said processing means from said film when said film is moved in said second direction over a substantial portion of its length.
 31. The apparatus of claim 30, further comprising signaling means operatively connected to said housing for producing a first or a second electrical signal according as said second control means has not or has been operated, respectively.
 32. A film cassette comprising an opaque housing, means forming a film gate in said housing, film supply means and film takeup means mounted in said housing and operable to exchange a strip of film therebetween, a strip of film having one end connected to said supply means and an opposite end connected to said takeup means and extending therebetween through said film gate for cooperation with a camera and with processing and projection means, said film being initially unexposed and primarily stored by said supply means, film processing means in said housing controlled by the state of said film in said housing for processing said film while it is first transferred from said takeup means to said supply means, and electrical signal generating means operatively connected to said processing means and effective when said film is primarily stored by said supply means for producing a first or a second electrical signal according as said film has not or has been processed, respectively.
 33. In combination with a film cassette comprising a housing containing a strip of film connected at its ends to supply and takeup means, each adapted to store substantially all of the film and to exchange film one with the other, said film passing over a predetermined path between said supply and takeup means, film processing means located in said housing adjacent said path and comprising coating means engageable with the film and effective when engaged and supplied with processing composition to coat said film with processing composition as said film is moved along said path, container means releasably holding a supply of processing composition, releasing means connected to said container means and operable to release said composition and supply it to saiD coating means, means forming a first actuating element on said film adjacent the end connected to said supply means, said first actuating element engaging said processing means with said film as said film moves toward said takeup means when substantially all of said film is stored by said takeup means, means responsive to movement of said film toward said supply means for operating said releasing means, means forming a second actuating element on said film, and disengaging means operated by said second actuating element as said film moves towards said supply means when substantially all of said film is stored by said supply means for disengaging said processing means from said film.
 34. The apparatus of claim 33, further comprising electrical signal generating means responsive to disengagement of said processing means by said disengaging means for producing a signal indicating that said film has been processed.
 35. The apparatus of claim 34, in which said disengaging means comprises a conductive element moved from a first position to a second position by said second actuating element, and in which said electrical signal generating means comprises a pair of electrical contacts extending through said housing and bridged by said conductive element in one of said positions.
 36. The apparatus of claim 35, in which said processing means comprises a coating nozzle adapted to contact said film when said processing means engages said film, and in which said disengaging means further comprises means for at least substantially closing said nozzle in said second position.
 37. The apparatus of claim 36, in which said coating nozzle is disposed on a first side of said film and said processing means further comprises a pressure pad in said housing and disposed on a second side of said film opposite said first side, means resiliently biasing said pressure pad toward said film and nozzle to tend to urge said film into engagement with said nozzle, detent means for initially holding said pressure pad out of engagement with said film, and means operatively connected to said pressure pad for engagement by said first actuating element to release said detent means and thereby effect engagement of said film with said nozzle.
 38. The apparatus of claim 37, in which said disengaging means comprises wedge means effective in said second position of said conductive element for moving said pressure pad out of engagement with said film and nozzle.
 39. The apparatus of claim 33, in which said processing means comprises a coating nozzle adapted to contact said film when said processing means engages said film, and in which said disengaging means comprises an element moved from a first position to a second position by said second actuating element, and means for at least substantially closing said nozzle in said second position.
 40. The apparatus of claim 33, in which said processing means comprises a coating nozzle adapted to contact said film when said processing means engages said film, and in which said disengaging means comprises an element moved from a first position to a second position by said second actuating element, and means for disengaging said film from said nozzle in said second position.
 41. The apparatus of claim 40, in which said coating nozzle is disposed on a first side of said film and said processing means further comprises a pressure pad in said housing and disposed on a second side of said film opposite said first side, means resiliently biasing said pressure pad toward said film and nozzle, detent means for initially holding said pressure pad out of engagement with said film, and means operatively connected to said pressure pad for engagement by said first actuating element to release said detent means and thereby effect engagement of said film with said nozzle.
 42. The apparatus of claim 41, in which said movable element of said disengaging means comprises wedge means effective in said second position for moving said pressure pad out of engagement witH said film and nozzle.
 43. The apparatus of claim 42, in which said movable element further comprises means for substantially closing said nozzle in said second position.
 44. A film cassette, comprising a housing: a supply reel and a takeup reel, each rotatably mounted in said housing; a strip of film having opposed ends, each operatively connected to a different one of said reels and extending therebetween over a path substantially shorter than the length of said strip; film processing means mounted in said housing adjacent said path and operable from a first inactive state, to a second state effective to coat said film with processing composition when said film is moved along said path upon rotation of said reels, and to a third inactive state; and electrical signal generating means operatively connected to said processing means, for producing a first signal in said first and second states of said processing means and a second signal in said third state of said processing means.
 45. In combination, a housing; a supply reel and a takeup reel each rotatably mounted in said housing; means forming a film gate in said housing; a strip of film having opposed ends, one of said ends being connected to said supply reel and the other of said ends being connected to said takeup reel, said strip passing between said reels through said film gate for cooperation with a camera and a projection system, for exposing, processing and projecting said film; film processing means in said housing and sequentially operable to a first state, to engage said film and apply processing composition to said film as said film is transported from said takeup reel toward said supply reel, and to a second state out of engagement with said film; and electrical signal generating means operatively connected to said processing means for producing a first or a second signal according as said processing means has not or has been operated to said second state, respectively.
 46. In combination, a film cassette comprising an opaque housing; a strip of film having opposed ends located in said housing; first film transport means, comprising film takeup means mounted in said housing and connected to one of said ends, and incremental advance means formed on said film; said first film transport means being responsive to selectively applied drive energy to advance said film incrementally onto said takeup means to a first predetermined position relative to said housing; second film transport means, comprising film supply means mounted in said housing and connected to the other of said ends; said second film transport means being responsive to selectively applied drive energy to continuously return film from said film takeup means to said film supply means to a second predetermined film position relative to said housing; processing means comprising a coating nozzle, container means releasably containing a quantity of film processing composition effective when released to supply said coating nozzle mounted in said housing adjacent said path and effective when supplied with processing composition to apply the composition to said film; release means connected to said container means and effective when actuated to release said processing composition, said release means comprising a closure tab initially sealing in an opening formed in said container means and detachable to relased said processing composition; first actuating means formed on said film and located thereon in position to detach said closure tab when said film is advanced to said first position toward said takeup means and then returned to said supply means, pressure pad means in said housing disposed on a second side of said film opposite said first side, means in said housing resiliently urging said pressure pad means toward said nozzle, releasable detent means initially holding said pressure pad means in a first position out of engagement with said film, second actuating means formed on said film adjacent said end connected to said supply means, And means located in said housing for engagement by said second actuating means as said film is advanced toward said first position when most of said film is on said takeup means to relase said detent means to bias said film into engagement with said nozzle.
 47. The apparatus of claim 46, further comprising third actuating means formed on said film adjacent said end connected to said takeup means, and restoring means mounted in said housing for movement from a first to a second position and adapted to be engaged by said third actuating means when said film approaches said second position and most of said film is on said supply means for moving said pressure pad means awaw from said film to release said film from said nozzle.
 48. The apparatus of claim 47, in which said restoring means comprises means for closing said nozzle in said second position of said restoring means.
 49. The apparatus of claim 48, in which said restoring means comprises wedge means for moving said pressure pad means out of engagement with said film, and film engaging means formed on said wedge means for engagement with said third actuating means.
 50. The apparatus of claim 49, in which said film engaging means comprises hook means connected to said wedge means and in which said third actuating means comprises an edge of an aperture formed in said film and adapted to engage said hook means.
 51. The apparatus of claim 49, in which said film engaging means comprises a pair of opposed resilient film engaging arms connected to said wedge means and adapted to engage the sides of said film, and in which said third actuating means comprises a pair of opposed notches having edges normal to the path of movement of the film and adapted to receive and hold said arms to move said wedge means to said second position.
 52. The apparatus of claim 49, further comprising a pair of electrical contacts mounted on said housing and extending therethrough to a corresponding pair of external terminals, and in which said restoring means comprises conductive means bridging said contacts in one and only one of said positions of said restoring means.
 53. The apparatus of claim 49, in which said wedge means comprises a pair of spaced wedge elements extending normal to the plane of said film in its path adjacent said processing means and adapted to engage said pressure pad means in said second position of said restoring means, and plate means joining said wedge elements, located on the same side of said film as said nozzle, and adapted to close said nozzle in said second position of said restoring means.
 54. The apparatus of claim 53, further comprising guide means formed on said pressure pad means for receiving and guiding said wedge elements.
 55. The apparatus of claim 53, further comprising resilient detent means connected to said wedge means and adapted to detachably engage a cooperating portion formed integral with said housing to detachably secure said wedge means in said first position of said restoring means, and in which said film engaging means comprises hook means connected to said wedge means, said third actuating means comprising an edge of an aperture formed in said film and adapted to engage said second hook means.
 56. The apparatus of claim 48, in which said restoring means comprises plate means slidably mounted in said housing on the same side of said film as said nozzle for movement between said first position, in which said nozzle is open, and said second position, in which said nozzle is closed by said wedge means; stop means on said housing for limiting the excursions of said plate means to movement between said positions; and a pair of guide apertures formed in said plate means, one on each side of said film; in which said means engaging said second actuating means comprises a pair of resilient film engaging arms connected to said pressure pad means, extending past and engaging the sides of said film, and each protruding through a different one of said apertures; and in wHich said second and third actuating means each comprise opposed notches formed on opposite sides of said film and adapted to receive said arms, said pairs of notches each comprising edges normal to the path of movement of said film and edges oblique to the path of movement of said film, said normal edges of said second actuating means confronting said takeup means, and said normal edges of said third actuating means confronting said supply means; whereby said pressure pad means is moved by said arms when said arms are engaged by said second actuating means while said plate means is held by said stop means in said first position, and both said pressure pad means and said plate means are moved by said arms when said arms are engaged by said third actuating means.
 57. The apparatus of claim 46, further comprising toggle means mounting said pressure pad means in said housing for movement relative to said nozzle.
 58. The apparatus of claim 46, further comprising cam means mounting said pressure pad means in said housing for movement relative to said nozzle.
 59. A film handling cassette comprising a housing, a strip of film stored within said housing, first normally inoperative means for applying processing composition to an incremental section of said film strip, second means responsive to externally mounted actuating means for progressively transporting said film strip transverse said first means, and third means for rendering said first means operative whereby substantially the entire length of said film strip may be treated with said processing composition and subsequently rendering said first means inoperative, said third means comprising first and second spaced apart tactile discontinuities on said film strip, said first tactile discontinuity configured to engage at least a portion of said first means responsive to the actuation of said second means to render said first means operative and said second tactile discontinuity configured to subsequently engage at least a portion of said first means responsive to the actuation of said second means to render said first means inoperative.
 60. Apparatus for applying processing fluid to a photographic film strip comprising first means for defining an opening through which processing fluid may be caused to flow, at least one electrical contact, and second means mounted for displacement between a first position wherein it does not block said opening and a second position wherein it does not block said opening, said second means being operably connected to said electrical contact when disposed in one but not both of its said positions.
 61. In combination, a film cassette comprising an opaque housing; a strip of film having opposed ends located in said housing; first film transport means, comprising film takeup means mounted in said housing and connected to one of said ends, and incremental advance means formed on said film; said first film transport means being responsive to selectively applied drive energy to advance said film incrementally onto said takeup means to a first predetermined position relative to said housing; second film transport means, comprising film supply means mounted in said housing and connected to the other of said ends; said second film transport means being responsive to selectively applied drive energy to continuously return film from said film takeup means to said film supply means to a second predetermined film position relative to said housing; processing means mounted in said housing adjacent said path and effective when actuated to apply processing composition to said film, said processing means comprising film coating means and container means releasably containing a quantity of film processing composition effective when released to supply said film coating means; and actuating means formed on said film and located thereon in position to actuate said processing means when said film is advanced to said first position toward said takeup means and then returned to said supply means, in whiCh said film coating means comprises a roll coater comprising a coating roll and mounted in sid housing for movement between a first position in which said coating roll is out of engagement with said film and a second position in which said roll operatively engages said film, wick means effective when said composition is released to supply said composition to said roll, and means responsive to release of said composition by said actuating means for moving said coater from its first to its second position.
 62. The apparatus of claim 61, further comprising second actuating means formed on said film adjacent said end connected to said takeup means to move said coater to its first position when said film is primarily on said supply means and is moving toward said supply means.
 63. In combination, a film cassette comprising an opaque housing; a strip of film having opposed ends located in said housing; first film transport means, comprising film takeup means mounted in said housing and connected to one of said ends, and incremental advance means formed on said film; said first film transport means being responsive to selectively applied drive energy to advance said film incrementally onto said takeup means to a first predetermined position relative to said housing; second film transport means, comprising film supply means mounted in said housing and connected to the other of said ends; said second film transport means being responsive to selectively applied drive energy to continuously return film from said film takeup means to said film supply means to a second predetermined film position relative to said housing; a coating nozzle mounted in said housing adjacent said film on a first side thereof and adapted to receive processing composition and apply the composition to said film, pressure pad means in said housing disposed on a second side of said film opposite said first side, toggle means mounting said pressure pad means in said housing for movement relative to said nozzle, said pressure pad means being operable when actuated to resiliently bias said film into engagement with said nozzle; container means mounted in said housing adjacent said nozzle and comprising wall means forming a receptacle open at one side, a quantity of film processing composition in said receptacle, and a flexible closure tab comprising a portion detachably secured to said receptacle to close said open side and initially contain said processing composition in said receptacle, said closure tab being formed with an extension initially folded back over said detachably secured portion generally in the plane of and overlying said film, film engaging means connected to said extension; and actuating means comprising an aperture formed in said film adjacent said end connected to said supply means and adapted to receive said film engaging means when said pressure pad means is actuated and said film is primarily on said takeup means as it is returned to said supply means to detach said closure tab to release said processing composition and thereby supply said composition to said nozzle.
 64. The apparatus of claim 63, further comprising a flexible strip having a first end secured to said nozzle and a second end, a second film engaging element connected to said second end and disposed adjacent said film when said pressure pad means is actuated; and a second aperture formed in said film adjacent said end connected to said takeup means and adapted to engage said second film engaging element when said film is primarily on said supply means as it moves toward said supply means to draw said flexible strip over, and thereby close, said nozzle.
 65. In combination, a film cassette comprising an opaque housing; a strip of film having opposed ends located in said housing; first film transport means, comprising film takeup means mounted in said housing and connected to one of said ends, and incremental advance means formed on said film; said film transport means being responsive to selectively applied Drive energy to advance said film incrementally onto said takeup means to a first predetermined position relative to said housing; second film transport means, comprising film supply means mounted in said housing and connected to the other of said ends; said second film transport means being responsive to selectively applied drive energy to continuously return film from said film takeup means to said film supply means to a second predetermined film position relative to said housing; processing means mounted in said housing adjacent said path and effective when actuated to apply processing composition to said film, said processing means comprising film coating means and container means releasably containing a quantity of film processing composition effective when released to supply said film coating means; and actuating means formed on said film and located thereon in position to actuate said processing means when said film is advanced to said first position toward said takeup means and then returned to said supply means, in which said means for releasing said composition comprises an over-center linkage operated by said actuating means, and detachable sealing means initially forming a portion of said container means and connected to said over-center linkage to be detached from and thereby open said container means when said actuating means engages said linkage.
 66. Apparatus for applying processing fluid to an elongated photographic film strip comprising means for defining an opening through which processing fluid may be caused to flow; means for progressively advancing said film strip across said opening; a pressure pad, said pressure pad being mounted for displacement between a first position wherein it does not locate the film strip in operative relationship with respect to said opening and a second position wherein it locates the film strip in operative relationship with respect to said opening; spring means for urging said pressure pad from its said first position into its said second position; means for releasably retaining said pressure pad in its said first position, said retaining means including complementary latching means on said pressure pad and said spring means and means for releasing said latching means responsive to the actuation of said advancing means.
 67. In combination with a photgraphic cassette comprising a housing containing a supply of strip film and means for moving said film over a predetermined path in said housing, processing means in said housing adjacent said path, said processing means comprising coating means effective when supplied with processing composition and engaged with said film to coat said composition on said film, wall means forming an outer container communicating with said coating means, an inner container located in said outer container and comprising means forming a receptacle open on one side, a flexible strip comprising a first portion detachably sealed to said open side to initially close and seal said receptacle, said strip further comprising a second portion extending from said inner container through and outside of said outer container and responsive to an applied force to at least partially detach said first portion from said receptacle and thereby open said inner container, and a charge of film processing composition initially sealed in said inner container and released upon opening of said inner container to supply said coating means.
 68. The apparatus of claim 67, in which said first portion of said strip lies in a plane oblique to the plane of said film in its path adjacent said processing means in the initial position of said first portion when sealing said receptacle.
 69. The apparatus of claim 68, in which said second portion of said strip lies in a plane oblique to the plane of said first portion at least in said initial position of said first portion.
 70. The apparatus of claim 69, in which the angle between said first and second portions of said strip is selected to minimize the force required to detach said first portion as a function of the stiffness of the strip and the force required to detach said first portion from said receptacle.
 71. In combination, a film cassette comprising an opaque housing, a strip of film having opposed ends located in said housing, first film transport means comprising film takeup means mounted in said housing and connected to one of said ends, said first film transport means being responsive to selectively applied drive energy to advance said film onto said takeup means, second film transport means, comprising film supply means mounted in said housing and connected to the other of said ends, said second film transport means being responsive to selectively applied drive energy to continuously return film from said film takeup means to said film supply means, processing means mounted in said housing adjacent said path and effective when actuated to apply processing composition to said film, said processing means comprising film coating means, container means releasably containing a quantity of film processing composition effective when released to supply said film coating means, actuating means formed on said film and located thereon in position to actuate said processing means when said film is advanced to said first position toward said takeup means and then returned to said supply means, means connected to said container means and effective when engaged by said actuating means to release said processing composition, said processing means comprising a coating nozzle in said housing adjacent said film on a first side thereof and adapted to receive processing composition from said container means, pressure pad means in said housing disposed on a second side of said film oposite said first side and operable when actuated to resiliently bias said film into engagement with said nozzle; in which said container means comprises wall means forming a receptacle open at one side and a flexible closure tab comprising a portion detachably secured to said receptacle to close said open side and initially contain said processing composition in said receptacle, said closue tab being formed with an extension intially folded back over said detachably secured portion generally in the plane of and overlying said film, film engaging means connected to said extension; and in which said actuating means comprises an aperture formed in said film adjacent said end connected to said supply means and adapted to receive said film engaging means when said pressure pad means is actuated and said film is primarily on said takeup means as it is returned to said supply means to detach said closure tab and release said processing composition.
 72. The apparatus of claim 71, further comprising a flexible strip having a first end secured to said nozzle and a second end; a second film engaging element connected to said second end and disposed adjacent said film when said pressure pad means is actuated; and a second aperture formed in said film adjacent said end connected to said takeup means and adapted to engage said second film engaging element when said film is primarily on said supply means as it moves toward said supply means to draw said flexible strip over, and thereby close, said nozzle.
 73. In combination, a film cassette comprising an opaque housing, a strip of film having opposed ends located in said housing, first film transport means comprising film takeup means mounted in said housing and connected to one of said ends, said first film transport means being responsive to selectively applied drive energy to advance said film onto said takeup means, second film transport means, comprising film supply means mounted in said housing and connected to the other of said ends, said second film transport means being responsive to selectively applied drive energy to continuously return film from said film takeup means to said film supply means, processing means mounted in said housing adjacent said path and effective when actuated to apply processing composItion to said film, said processing means comprising film coating means, container means releasably containing a quantity of film processing composition effective when released to supply said film coating means, first actuating means formed on said film and located thereon in position to actuate said processing means when said film is advanced to said first position toward said takeup means and then returned to said supply means, means connected to said container means and effective when engaged by said first actuating means to release said processing composition, said processing means comprising a coating nozzle in said housing disposed on a first side of said film and adapted to receive processing composition from said container means, pressure pad means in said housing disposed on a second side of said film opposite said first side, means in said housing resiliently urging said pressure pad means toward said nozzle, releasable detent means initially holding said pressure pad means in a first position out of engagement with said film, second actuating means formed on said film adjacent said end connected to said supply means, and means located in said housing for engagement by said second actuating means as said film is advanced toward said first position when most of said film is on said takeup means to release said detent means to bias said film into engagement with said nozzle.
 74. The apparatus of claim 73, further comprising third actuating means formed on said film adjacent said end connected to said takeup means; and restoring means mounted in said housing for movement from a first to a second position and adapted to be engaged by said third actuating means when said film approaches said second position and most of said film is on said supply means for moving said pressure pad means away from said film to release said film from said nozzle.
 75. The apparatus of claim 74, in which said restoring means comprises means for closing said nozzle in said second position of said restoring means.
 76. The apparatus of claim 75, in which said restoring means comprises wedge means for moving said pressure pad means out of engagement with said film, and film engaging means formed on said wedge means for engagement with said third actuating means.
 77. The apparatus of claim 76, in which said film engaging means comprises hook means connected to said wedge means and in which said third actuating means comprises an edge of an aperture formed in said film and adapted to engage said hook means.
 78. The apparatus of claim 76, in which said film engaging means comprises a pair of opposed resilient film engaging arms connected to said wedge means and adapted to engage the sides of said film, and in which said third actuating means comprises a pair of opposed notches having edges normal to the path of movement of the film and adapted to receive and hold said arms to move said wedge means to said second position.
 79. The apparatus of claim 76, in which said wedge means comprises a pair of spaced wedge elements extending normal to the plane of said film in its path adjacent said processing means and adapted to engage said pressure pad means in said second position of said restoring means, and plate means joining said wedge elements, located on the same side of said film as said nozzle, and adapted to close said nozzle in said second position of said restoring means.
 80. The apparatus of claim 79, further comprising guide means formed on said pressure pad means for receiving and guiding said wedge elements.
 81. The apparatus of claim 79, further comprising resilient detent means connected to said wedge means and adapted to detachably engage a cooperating portion formed integral with said housing to detachably secure said wedge means in said first position of said restoring means, and in which said film engaging means comprises hook means connected to said wedge means, said third actuating means comprising an edge of an aperture formed in said film and adapted to eNgage said second hook means.
 82. The apparatus of claim 75, in which said restoring means comprises plate means slidably mounted in said housing on the same side of said film as said nozzle for movement between said first position, in which said nozzle is open, and said second position, in which said nozzle is closed by said wedge means; stop means on said housing for limiting the excursions of said plate means to movement between said positions; and a pair of guide apertures formed in said plate means, one on each side of said film; in which said means engaging said second actuating means comprises a pair of resilient film engaging arms connected to said pressure pad means, extending past and engaging the sides of said film, and each protruding through a different one of said apertures; and in which said second and third actuating means each comprise opposed notches formed on opposite sides of said film and adapted to receive said arms, said pairs of notches each comprising edges normal to the path of movement of said film and edges oblique to the path of movement of said film, said normal edges of said second actuating means confronting said takeup means, and said normal edges of said third actuating means confronting said supply means; whereby said pressure pad means is moved by said arms when said arms are engaged by said second actuating means while said plate means is held by said stop means in said first position, and both said pressure pad means and said plate means are moved by said arms when said arms are engaged by said third actuating means.
 83. The apparatus of claim 74, further comprising a pair of electrical contacts mounted on said housing and extending therethrough to a corresponding pair of external terminals, and in which said restoring means comprises conductive means bridging said contacts in one and only one of said positions of said restoring means.
 84. The apparatus of claim 73, further comprising toggle means mounting said pressure pad means in said housing for movement relative to said nozzle.
 85. The apparatus of claim 73, further comprising cam means mounting said pressure pad means in said housing for movement relative to said nozzle.
 86. In combination, a film cassette comprising an opaque housing; a strip of film having opposed ends located in said housing; first film transport means, comprising film takeup means mounted in said housing and connected to one of said ends, and incremental advance means formed on said film; said first film transport means being responsive to selectively applied drive energy to advance said film incrementally onto said takeup means to a first predetermined position relative to said housing; second film transport means, comprising film supply means mounted in said housing and connected to the other of said ends; said second film transport means being responsive to selectively applied drive energy to continuously return film from said film takeup means to said film supply means to a second predetermined film position relative to said housing; processing means mounted in said housing adjacent said path and effective when actuated to apply processing composition to said film, said processing means comprising film coating means and container means releasably containing a quantity of film processing composition effective when released to supply said film coating means; and actuating means formed on said film and located thereon in position to actuate said processing means when said film is advanced to said first position toward said takeup means and then returned to said supply means, in which said film coating means comprises a roll coater having a coating roll normally engaging said film, and means effective when said composition is released to supply said composition to said roll, said roll coater being mounted in said housing between a first position in which said coating roll engages said film and a second position in which said roll is disengaged from said film; and second actuating means formed on said film adjacent said end connected to said takeup means to move said coater to its second position as said film moves toward said supply means when it is primarily on said supply means.
 87. The apparatus of claim 86, in which said roll coater is held in its initial position by an overcenter linkage, means resiliently biasing said coater toward its second position, and means engaged by said second actuating means for collapsing said overcenter linkage to cause said coater to be biased to its second position.
 88. The apparatus of claim 87, in which said roller coater is held in its initial position by an overcenter linkage, means resiliently biasing said coater toward its second position, and means engaged by said second actuating means for collapsing said overcenter linkage to cause said coater to be biased to its second position.
 89. In combination, a film cassette comprising an opaque housing, a strip of film having opposed ends located in said housing, first film transport means comprising film takeup means mounted in said housing and connected to one of said ends, said first film transport means being responsive to selectively applied drive energy to advance said film onto said takeup means, second film transport means, comprising film supply means mounted in said housing and connected to the other of said ends, said second film transport means being responsive to selectively applied drive energy to continuously return film from said film takeup means to said film supply means, processing means mounted in said housing adjacent said path and effective when actuated to apply processing composition to said film, said processing means comprising film coating means, container means releasably containing a quantity of film processing composition effective when released to supply said film coating means, first actuating means formed on said film and located thereon in position to actuate said processing means when said film is advanced to said first position toward said takeup means and then returned to said supply means, means connected to said container means and effective when engaged by said first actuating means to release said processing composition, said film coating means comprising a roll coater comprising a coating roll and mounted in said housing for movement between a first position in which said coating roll is out of engagement with said film and a second position in which said roll operatively engages said film, wick means effective when said composition is released to supply said composition to said roll, and means responsive to release of said composition by said actuating means for moving said coater from its first to its second position, and further comprising second actuating means formed on said film adjacent said end connected to said takeup means to move said coater to its first position when said film is primarily on said supply means and is moving toward said supply means.
 90. In combination, a film cassette comprising an opaque housing, a strip of film having opposed ends located in said housing, first film transport means comprising film takeup means mounted in said housing and connected to one of said ends, said first film transport means being responsive to selectively applied drive energy to advance said film onto said takeup means, second film transport means, comprising film supply means mounted in said housing and connected to the other of said ends, said second film transport means being responsive to selectively applied drive energy to continuously return film from said film takeup means to said film supply means, processing means mounted in said housing adjacent said path and effective when actuated to apply processing composition to said film, said processing means comprising film coating means, container means releasably containing a quantity of film processing composition effective when released to supply said film coating means, actuating means formed on said film and located thereon in position to actuAte said processing means when said film is advanced to said first position toward said takeup means and then returned to said supply means, means connected to said container means and effective when engaged by said actuating means to release said processing composition, said means for releasing said composition comprising an over-center linkage operated by said actuating means, and detachable sealing means initially forming a portion of said container means and connected to said over-center linkage to be detached from and thereby open said container means when said actuating means engages said linkage.
 91. In combination, a film cassette comprising an opaque housing, a strip of film having opposed ends located in said housing, first film transport means comprising film takeup means mounted in said housing and connected to one of said ends, said first film transport means being responsive to selectively applied drive energy to advance said film onto said takeup means, second film transport means, comprising film supply means mounted in said housing and connected to the other of said ends, said second film transport means being responsive to selectively applied drive energy to continuously return film from said film takeup means to said film supply means, processing means mounted in said housing adjacent said path and effective when actuated to apply processing composition to said film, actuating means formed on said film and located thereon in position to actuate said processing means when said film is advanced to said first position toward said takeup means and then returned to said supply means, and electrical signal generating means controlled by said processing means for producing a first or a second signal according as said processing means has not or has been actuated, respectively.
 92. A photographic cassette, comprising a housing containing a strip of film connected at its ends to supply and takeup means and passing therebetween through a film gate for cooperation with a camera and with a projection system to be incrementally advanced from said supply means, said takeup and supply means being responsive to selectively applied drive energy to advance said film to said takeup means and return it to said supply means, respectively; film processing means located in said first housing adjacent said film and operable to a first state for engaging said film and processing it when the film is moved with respect to the processing means, and to a second state out of engagement with said film; means responsive to movement of said film in said housing toward said takeup means beyond a predetermined exposure end point for operating said processing means to said first state; means responsive to movement of said film toward said supply means when said film is primarily stored by said supply means for operating said processing means to said second state; and electrical signal generating means controlled by said processing means for producing a first or a second electrical signal according as said processing means has not or has been operated to its second state, respectively.
 93. Apparatus for applying processing fluid to an elongated photographic film strip comprising first means for defining an opening through which processing fluid may be caused to flow; second means for progressively advancing said film strip transverse said opening; third means for engaging the film strip, said third means mounted for displacement responsive to the actuation of said second means, between a first position wherein it does not locate the film strip in operative relationship with respect to said opening and a second position wherein it locates the film strip in operative relationship with respect to said opening and fourth means mounted for displacement, responsive to the actuation of said second means, between a first position wherein it does not block said opening and it does not preclude said third means from moving into its said second position and a second position wherein it blockS said opening and precludes said third means from moving into its said second position.
 94. The apparatus of claim 93 wherein said fourth means serves to displace said third means from its said second position into its said first position when said fourth means is displaced from its said first position into its said second position.
 95. The apparatus of claim 93 wherein said fourth means comprises a wedge arranged to interpose itself between said opening and said third means and displace said third means from its said second position into its said first position as said wedge is displaced from its said first position into its said second position.
 96. The Apparatus of claim 93 wherein said third means is initially disposed in its said first position and said apparatus additionally includes means for effecting relative movement of the film strip with respect to said opening and at least said third means or said fourth means includes means for engaging the film strip during said relative movement thereof to effect its displacement from its said first position into its said second position.
 97. Apparatus for applying processing fluid to a photographic film strip comprising first means for defining an opening through which processing fluid may be caused to flow; second means for engaging the film strip, said second means mounted for displacement between a first position wherein it does not locate the film strip in operative relationship with respect to said opening and a second position wherein it locates the film strip in operative relationship with respect to said opening; third means mounted for displacement between a first position wherein it does not block said opening and it does not preclude said second means from moving into its said second position and a second position wherein it blocks said opening and precludes said second means from moving into its said second position, and at least one electrical contact positioned to be operably connected to a selected one of either said first means or said second means when said selected one means is in one of its said positions and to be operably disconnected from said selected one means when said selected one means is in its other said position.
 98. The apparatus of claim 97 wherein said selected one means is said third means.
 99. The apparatus of claim 98 wherein said third means is operably connected to said electrical contact when it is disposed in its said first position. 